I think you'd be fine here in Australia but that depends on whether you have a job or not. Australia is good for anyone who comes with employment already. Otherwise its Work And Holiday visa pathways are better suited to younger people because of the usually physical and demanding nature of the jobs available.
Otherwise Argentina would also be legally okay for you, however I haven't lived there for a very long time so I can't say for sure. It would be a lot less safe for foreigners than Australia but I hear it wouldn't be more rough than some of the rough places in the US. You will want a stable source of income ideally from a remote job, such as freelancing for clients that can pay with dollars or euros. You will also want a friend who's native or already well established so they can teach you the ropes socially/locally and with the current state of the country. I would personally not go back to Argentina without a stable income because making a livable income inside the country is going to be next to impossible.